title: Effect of calcinated oyster shell powder on growth, yield, spawn run, and primordial formation of king oyster mushroom (Pleurotus eryngii).
abstract: This study was conducted to evaluate the calcium (Ca) absorption efficacy of king oyster mushroom (Pleurotus eryngii) grown on sawdust medium supplemented with Ca-sources, including oyster shell powder, and to determine the efficacy of oyster shell powder as a calcium supplement on growth, yield, spawn run and primordial formation of P. eryngii. Optimum calcination of oyster shell powder was achieved at the temperature of 620.56 °C. A 1% supplementation of oyster shell powder in sawdust medium did not suppress the mycelial growth of P. eryngii. Also the supplementation of 2% calcinated oyster shell powder to sawdust medium potentially increased the calcium content up to a level of 315.7 ± 15.7 mg/100 g in the fruiting body of P. eryngii, without extension of duration of spawn run and the retardation of the days to primordial formation. These results suggest that the shellfish by-products, including oyster shell powder, can be utilized to develop calcium enriched king oyster mushrooms.
authors.affiliation: School of Nano-Bioscience and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan 689, Korea. loh99@kangwon.ac.kr
authors.forename: Ung-Kyu
authors.initials: UK
authors.lastname: Choi
authors.forename: Ok-Hwan
authors.initials: OH
authors.lastname: Lee
authors.forename: Young-Chan
authors.initials: YC
authors.lastname: Kim
mesh_terms: D000818:Animals; D010125:Ostreidae / Q000254:growth & development / Q000502:physiology; D020076:Pleurotus / Q000502:physiology*; D011208:Powders
chemical_list: D011208:Powders